ARDX SEC Filing News — Ardelyx, Inc.

Latest SEC filings for Ardelyx, Inc. (ARDX) explained in plain English. Covers insider buying and selling (Form 4), proposed insider sales (Form 144), material company events (8-K), and quarterly & annual reports (10-Q / 10-K). StrongBuyAnalytics provides navigation and brief excerpts or summaries; original filings remain at the SEC/source links and were authored by their filers, not StrongBuyAnalytics. Filing dates shown are source dates. Coverage and detection can be delayed or incomplete because of SEC availability, amendments, parsing, caching, or outages. Latest source filing date shown: 2026-08-25.

Ardelyx, Inc. discovers, develops, and commercializes medicines to treat unmet medical needs in the United States and internationally. The company offers IBSRELA, a minimally absorbed small molecule therapy for the treatment of patients with irritable bowel syndrome with constipation; and XPHOZAH, a phosphate absorption inhibitor to reduce serum phosphorus in adults with chronic kidney disease on dialysis. Ardelyx, Inc. was formerly known as Nteryx, Inc. and changed its name to Ardelyx, Inc. in …
Sector: Healthcare Industry: Biotechnology Market Cap: $801.7M
20
Total Filings
0
Bullish Classifications
9
Bearish Classifications
9
Insider Transactions
2
Material Events (8-K)
1
Periodic Reports
Rule-based classifications for ARDX currently lean bearish. Of the 20 filing records displayed, 9 carry bearish classifications (such as insider sales or negative 8-K disclosures) versus 0 bullish. This does not necessarily signal fundamental deterioration — insiders sell for many reasons — but it is worth monitoring alongside the company's core financial metrics.
ARDX Filing Activity Snapshot 2026-07-17 — 2026-08-25
Insider Transactions (Form 4)
0 buys vs 9 sells
Net insider selling in this period — insiders sell for many reasons beyond conviction.
Largest Form 144 Filing
$225.9K
RAAB MICHAEL (Director, President & CEO) · 2026-08-25
58,574 shares · Form 4
Form 144 Notices
8
Proposed insider sales filed — Form 144 is a notice of intent, not a confirmed transaction. Actual sales are confirmed via Form 4.
Insider Transactions 9 · Forms 3, 4 and 5

A Form 4 is filed within two business days of a company insider — an officer, a director, or a holder of more than ten percent of the stock — changing their position in the shares. All 9 filings in this group are Form 4s for Ardelyx, Inc.

The difficulty with reading these filings as a group is that a single form type covers transactions that mean entirely different things. An executive spending their own money to buy stock and an executive having shares withheld to pay tax on a vesting grant both appear as a Form 4. Every filing below is therefore tagged with the nature of the underlying transaction, taken from the transaction code reported on the form itself.

Across the 9 insider filings shown, the breakdown is 9 open-market sale. 9 of them involved a discretionary open-market trade; the rest are compensation and administrative mechanics.

What each transaction type means

Open-market sale ×9
The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.
Form 4 Open-market sale Insider Selling 2026-08-25

ARDX insider Hohenleitner Susan (Chief Financial Officer) sold 1,558 shares (~$6.0K)

Hohenleitner Susan, listed as Chief Financial Officer at ARDELYX, INC., reported an open-market sale of 1,558 ARDX shares in a Form 4 filing. This is a confirmed insider sale, not just a proposed sale notice.

The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.

Transactions reported on this filing
Code Nature Shares Price Value
S Open-market sale 1,558 $3.86 $6.0K
Filing: Form 4 (Insider Transaction) Insider: Hohenleitner Susan (Chief Financial Officer) Shares: 1,558 Est. Value: $6.0K
View on SEC EDGAR → Open Filing Document →
Form 4 Open-market sale Insider Selling 2026-08-25

ARDX insider Reilly Joseph James (See Remarks) sold 3,982 shares (~$15.4K)

Reilly Joseph James, listed as See Remarks at ARDELYX, INC., reported an open-market sale of 3,982 ARDX shares in a Form 4 filing. This is a confirmed insider sale, not just a proposed sale notice.

The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.

Transactions reported on this filing
Code Nature Shares Price Value
S Open-market sale 2,872 $3.86 $11.1K
S Open-market sale 1,110 $3.86 $4.3K
Filing: Form 4 (Insider Transaction) Insider: Reilly Joseph James (See Remarks) Shares: 3,982 Est. Value: $15.4K
View on SEC EDGAR → Open Filing Document →
Form 4 Open-market sale Insider Selling 2026-08-25

ARDX insider Bishop John E (See Remarks) sold 19,750 shares (~$76.2K)

Bishop John E, listed as See Remarks at ARDELYX, INC., reported an open-market sale of 19,750 ARDX shares in a Form 4 filing. This is a confirmed insider sale, not just a proposed sale notice.

The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.

Transactions reported on this filing
Code Nature Shares Price Value
S Open-market sale 17,281 $3.86 $66.7K
S Open-market sale 2,469 $3.86 $9.5K
Filing: Form 4 (Insider Transaction) Insider: Bishop John E (See Remarks) Shares: 19,750 Est. Value: $76.2K
View on SEC EDGAR → Open Filing Document →
Form 4 Open-market sale Insider Selling 2026-08-25

ARDX insider Brady James Parker (Chief Human Resources Officer) sold 15,136 shares (~$58.4K)

Brady James Parker, listed as Chief Human Resources Officer at ARDELYX, INC., reported an open-market sale of 15,136 ARDX shares in a Form 4 filing. This is a confirmed insider sale, not just a proposed sale notice.

The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.

Transactions reported on this filing
Code Nature Shares Price Value
S Open-market sale 1,976 $3.86 $7.6K
S Open-market sale 13,160 $3.86 $50.8K
Filing: Form 4 (Insider Transaction) Insider: Brady James Parker (Chief Human Resources Officer) Shares: 15,136 Est. Value: $58.4K
View on SEC EDGAR → Open Filing Document →
Form 4 Open-market sale Insider Selling 2026-08-25

ARDX insider Foster Eric Duane (Chief Commercial Officer) sold 8,562 shares (~$33.0K)

Foster Eric Duane, listed as Chief Commercial Officer at ARDELYX, INC., reported an open-market sale of 8,562 ARDX shares in a Form 4 filing. This is a confirmed insider sale, not just a proposed sale notice.

The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.

Transactions reported on this filing
Code Nature Shares Price Value
S Open-market sale 2,598 $3.86 $10.0K
S Open-market sale 3,389 $3.86 $13.1K
S Open-market sale 2,575 $3.86 $9.9K
Filing: Form 4 (Insider Transaction) Insider: Foster Eric Duane (Chief Commercial Officer) Shares: 8,562 Est. Value: $33.0K
View on SEC EDGAR → Open Filing Document →
Form 4 Open-market sale Insider Selling 2026-08-25

ARDX insider Kelliher Mike (Chief Business Officer) sold 7,758 shares (~$29.9K)

Kelliher Mike, listed as Chief Business Officer at ARDELYX, INC., reported an open-market sale of 7,758 ARDX shares in a Form 4 filing. This is a confirmed insider sale, not just a proposed sale notice.

The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.

Transactions reported on this filing
Code Nature Shares Price Value
S Open-market sale 3,104 $3.86 $12.0K
S Open-market sale 2,652 $3.86 $10.2K
S Open-market sale 2,002 $3.86 $7.7K
Filing: Form 4 (Insider Transaction) Insider: Kelliher Mike (Chief Business Officer) Shares: 7,758 Est. Value: $29.9K
View on SEC EDGAR → Open Filing Document →
Form 4 Open-market sale Insider Selling 2026-08-25

ARDX insider Williams Laura A (Chief Patient Officer) sold 10,739 shares (~$41.4K)

Williams Laura A, listed as Chief Patient Officer at ARDELYX, INC., reported an open-market sale of 10,739 ARDX shares in a Form 4 filing. This is a confirmed insider sale, not just a proposed sale notice.

The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.

Transactions reported on this filing
Code Nature Shares Price Value
S Open-market sale 3,486 $3.86 $13.4K
S Open-market sale 3,089 $3.86 $11.9K
S Open-market sale 2,430 $3.86 $9.4K
S Open-market sale 1,734 $3.86 $6.7K
Filing: Form 4 (Insider Transaction) Insider: Williams Laura A (Chief Patient Officer) Shares: 10,739 Est. Value: $41.4K
View on SEC EDGAR → Open Filing Document →
Form 4 Open-market sale Insider Selling 2026-08-25

ARDX insider RAAB MICHAEL (Director, President & CEO) sold 58,574 shares (~$225.9K)

RAAB MICHAEL, listed as Director, President & CEO at ARDELYX, INC., reported an open-market sale of 58,574 ARDX shares in a Form 4 filing. This is a confirmed insider sale, not just a proposed sale notice.

The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.

Transactions reported on this filing
Code Nature Shares Price Value
S Open-market sale 15,009 $3.86 $57.9K
S Open-market sale 15,976 $3.86 $61.6K
S Open-market sale 8,411 $3.86 $32.4K
S Open-market sale 19,178 $3.86 $74.0K
Filing: Form 4 (Insider Transaction) Insider: RAAB MICHAEL (Director, President & CEO) Shares: 58,574 Est. Value: $225.9K
View on SEC EDGAR → Open Filing Document →
Form 4 Open-market sale Insider Selling 2026-07-17

ARDX insider RAAB MICHAEL (Director, President & CEO) sold 41,668 shares (~$210.9K)

RAAB MICHAEL, listed as Director, President & CEO at ARDELYX, INC., reported an open-market sale of 41,668 ARDX shares in a Form 4 filing. This is a confirmed insider sale, not just a proposed sale notice.

The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.

Transactions reported on this filing
Code Nature Shares Price Value
M Option exercise 20,834 $0.99 $20.6K
S Open-market sale 41,668 $5.06 $210.9K
M Option exercise derivative · Stock Option (Right to Buy) 20,834 — —
Filing: Form 4 (Insider Transaction) Insider: RAAB MICHAEL (Director, President & CEO) Shares: 41,668 Est. Value: $210.9K
View on SEC EDGAR → Open Filing Document →
Proposed Insider Sales 8 · Form 144

A Form 144 is a notice of intent to sell restricted or control securities. It is not a record that anything was sold. Ardelyx, Inc. has 8 such notices in this period.

The distinction matters because a Form 144 is frequently reported as though it were a completed insider sale. The filer may sell all of the shares covered, some of them, or none at all, and there is no obligation to update the notice either way. A sale that is actually executed by an officer or director shows up separately on a Form 4, which is the filing to check before treating a proposed sale as a real one.

Form 144 Proposed Insider Sale 2026-08-21

ARDX Form 144 filed for proposed insider sale by Hohenleitner Susan (2,650 shares) ~$10.7K

Hohenleitner Susan filed a Form 144 with the SEC indicating intent to sell ARDX (ARDELYX, INC.) shares. Form 144 reflects a proposed sale, not a completed transaction. The actual execution, if any, would typically appear later in a Form 4.

Filing: Form 144 (Proposed Sale Notice) Insider: Hohenleitner Susan Shares: 2,650 Est. Value: $10.7K
View on SEC EDGAR → Open Filing Document →
Form 144 Proposed Insider Sale 2026-08-21

ARDX Form 144 filed for proposed insider sale by Kelliher Mike (10,500 shares) ~$42.3K

Kelliher Mike filed a Form 144 with the SEC indicating intent to sell ARDX (ARDELYX, INC.) shares. Form 144 reflects a proposed sale, not a completed transaction. The actual execution, if any, would typically appear later in a Form 4.

Filing: Form 144 (Proposed Sale Notice) Insider: Kelliher Mike Shares: 10,500 Est. Value: $42.3K
View on SEC EDGAR → Open Filing Document →
Form 144 Proposed Insider Sale 2026-08-21

ARDX Form 144 filed for proposed insider sale by RAAB MICHAEL (44,500 shares) ~$179.3K

RAAB MICHAEL filed a Form 144 with the SEC indicating intent to sell ARDX (ARDELYX, INC.) shares. Form 144 reflects a proposed sale, not a completed transaction. The actual execution, if any, would typically appear later in a Form 4.

Filing: Form 144 (Proposed Sale Notice) Insider: RAAB MICHAEL Shares: 44,500 Est. Value: $179.3K
View on SEC EDGAR → Open Filing Document →
Form 144 Proposed Insider Sale 2026-08-21

ARDX Form 144 filed for proposed insider sale by Williams Laura A (10,500 shares) ~$42.3K

Williams Laura A filed a Form 144 with the SEC indicating intent to sell ARDX (ARDELYX, INC.) shares. Form 144 reflects a proposed sale, not a completed transaction. The actual execution, if any, would typically appear later in a Form 4.

Filing: Form 144 (Proposed Sale Notice) Insider: Williams Laura A Shares: 10,500 Est. Value: $42.3K
View on SEC EDGAR → Open Filing Document →
Form 144 Proposed Insider Sale 2026-08-21

ARDX Form 144 filed for proposed insider sale by Reilly Joseph James (4,700 shares) ~$18.9K

Reilly Joseph James filed a Form 144 with the SEC indicating intent to sell ARDX (ARDELYX, INC.) shares. Form 144 reflects a proposed sale, not a completed transaction. The actual execution, if any, would typically appear later in a Form 4.

Filing: Form 144 (Proposed Sale Notice) Insider: Reilly Joseph James Shares: 4,700 Est. Value: $18.9K
View on SEC EDGAR → Open Filing Document →
Form 144 Proposed Insider Sale 2026-08-21

ARDX Form 144 filed for proposed insider sale by Bishop John E (25,500 shares) ~$102.8K

Bishop John E filed a Form 144 with the SEC indicating intent to sell ARDX (ARDELYX, INC.) shares. Form 144 reflects a proposed sale, not a completed transaction. The actual execution, if any, would typically appear later in a Form 4.

Filing: Form 144 (Proposed Sale Notice) Insider: Bishop John E Shares: 25,500 Est. Value: $102.8K
View on SEC EDGAR → Open Filing Document →
Form 144 Proposed Insider Sale 2026-08-21

ARDX Form 144 filed for proposed insider sale by Brady James Parker (19,700 shares) ~$79.4K

Brady James Parker filed a Form 144 with the SEC indicating intent to sell ARDX (ARDELYX, INC.) shares. Form 144 reflects a proposed sale, not a completed transaction. The actual execution, if any, would typically appear later in a Form 4.

Filing: Form 144 (Proposed Sale Notice) Insider: Brady James Parker Shares: 19,700 Est. Value: $79.4K
View on SEC EDGAR → Open Filing Document →
Form 144 Proposed Insider Sale 2026-08-21

ARDX Form 144 filed for proposed insider sale by Foster Eric Duane (11,900 shares) ~$48.0K

Foster Eric Duane filed a Form 144 with the SEC indicating intent to sell ARDX (ARDELYX, INC.) shares. Form 144 reflects a proposed sale, not a completed transaction. The actual execution, if any, would typically appear later in a Form 4.

Filing: Form 144 (Proposed Sale Notice) Insider: Foster Eric Duane Shares: 11,900 Est. Value: $48.0K
View on SEC EDGAR → Open Filing Document →
Material Events 2 · Form 8-K

An 8-K reports a material event in the window between scheduled reports. There are 2 in this period for Ardelyx, Inc. Each 8-K names the item number it is filed under, and that number is the fastest way to tell a routine disclosure from a consequential one.

Item 2.02 is an earnings release, Item 5.02 is a change of directors or officers, and Item 1.01 or 2.01 covers a material agreement or a completed acquisition. Item 7.01 and Item 8.01 are the general-purpose disclosure items and carry no fixed meaning on their own.

Form 8-K Material Company Update 2026-08-17

ARDX filed 8-K — material company event

ARDELYX, INC. filed an 8-K with the SEC reporting a material event. Summary unavailable — view the original SEC filing for the full text.

Filing: 8-K (Material Event)
View on SEC EDGAR → Open Filing Document →
Form 8-K Material Company Update 2026-08-06

ARDX filed 8-K — material company event

ARDELYX, INC. filed an 8-K with the SEC reporting a material event. Summary unavailable — view the original SEC filing for the full text.

Filing: 8-K (Material Event)
View on SEC EDGAR → Open Filing Document →
Periodic Reports 1 · Forms 10-K and 10-Q

The periodic reports are where the audited and reviewed financial statements live. This period contains 1 quarterly report (10-Q) for Ardelyx, Inc.

The two are not equivalent in weight. A 10-K is audited by an external firm and includes the full risk factor disclosure, business description and management discussion; a 10-Q is unaudited, reviewed rather than examined, and much shorter. When a figure in a quarterly report is later revised, the annual report is usually where the correction appears.

An amended report — 10-K/A or 10-Q/A — restates or corrects something in the original filing, and is worth reading against the version it replaces.

Form 10-Q Quarterly Report 2026-08-06

ARDX filed Quarterly Report (10-Q)

ARDELYX, INC. filed its quarterly report with the SEC. This report includes unaudited financial statements and management discussion for the quarter.

Filing: 10-Q (Quarterly Report)
View on SEC EDGAR → Open Filing Document →

How we classify Ardelyx, Inc.'s filings

Straight from EDGAR

Each displayed record links to an original source document. StrongBuyAnalytics provides navigation and brief excerpts or summaries, not the filing itself. Parsing may omit context or contain errors, so read the original document in full.

Transaction codes, not guesswork

The nature shown on each insider filing comes from the transaction code the filer entered on the form itself — P for an open-market purchase, A for a compensation award, F for shares withheld to pay tax, M for an option exercise. Where one filing contains several codes, the transaction table lists them line by line.

Why the distinction matters

Insider activity is routinely summarised as buying or selling, which flattens together decisions that mean very different things. Shares withheld for tax on a vesting grant are an automatic administrative step; shares bought on the open market are someone committing their own money at the current price.

What this page does not tell you

A filing records what happened, not why. Form 4 does not always disclose whether a sale was executed under a pre-arranged Rule 10b5-1 plan, and no single filing is a basis for a decision on ARDX. Read these alongside the fundamentals rather than in isolation.

Frequently Asked Questions — ARDX SEC Filings

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Publisher, sources & limitations — September 15, 2026. StrongBuyAnalytics provides navigation and brief excerpts or summaries for educational use. Original filings remain at SEC EDGAR or other displayed source links; StrongBuyAnalytics does not author them. Filing dates are source dates, not publication dates for this page. Coverage can be delayed, incomplete, amended, or unavailable because of SEC/source availability, parsing, caching, or outages. Verify every material statement in the original filing.
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